Question

我正在实现以下方法来保存文本字段的数据，以防更改为_detailsDictionary，但是当它保存时，在textfield.text中输入的最后一个字母不会出现，例如，如果我是保存Krish，然后只保存kris。如何解决这些问题？

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSInteger field = textField.tag;

    if(field ==1)
    {

        if(textField.text ==[_detailsDictionary valueForKey:@"FName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"FName"];
        }
        return YES;
            }
    if(field ==2)
    {


        if(textField.text ==[_detailsDictionary valueForKey:@"MName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"MName"];
        }

         return YES;
    }

    if(field ==3)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"LName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"LName"];
        }
         return YES;
    }

    if(field ==4)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"City"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"City"];
        }
         return YES;
    }

    if(field ==5)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"State"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"State"];
     }
         return YES;
    }

    if(field ==6)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"Country"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"Country"];
        }
         return YES;
    }

    if(field ==7)
    {

        if(textField.text ==[_detailsDictionary valueForKey:@"DOB"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"DOB"];
        }
         return YES;
    }
    return NO;
}

Answer 1

已知-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string函数用于在写入的字符附加到实际字符串之前对textfield进行更改。因此，当您尝试从此函数中的textfield获取文本时，最后一个字符尚未添加到字符串中。

因此，不要使用此功能，请使用此- (void)textFieldDidEndEditing:(UITextField *)textField

Answer 2

在shouldChangeCharactersInRange方法中，您无法获得textfield.text的全文，因为在文本实际输入textfield之前调用此方法

您需要使用

NSString *strText = [textField.text stringByReplacingCharactersInRange:range withString:string];

此处strText您将获得fullText

Answer 3

我在这里使用rajat的答案，但没有更多细节。首先，你需要全文：

NSString *strText = [textField.text stringByReplacingCharactersInRange:range withString:string];

然后您必须将strText添加到词典而不是textField.text

Answer 4

如果要将数据存储在shouldChangeCharactersInRange mathod。

中，则需要尝试此操作

NSString *fname = [textField.text stringByReplacingCharactersInRange:range withString:string];
[_detailsDictionary setObject:fname forKey:@"FName"];

希望它会对你有所帮助。

Answer 5

改为使用

-(void) textFieldDidEndEditing:(UITextField *)textField
{
    NSInteger field = textField.tag;

    if(field ==1)
    {

        if(textField.text ==[_detailsDictionary valueForKey:@"FName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"FName"];
        }

            }
    if(field ==2)
    {


        if(textField.text ==[_detailsDictionary valueForKey:@"MName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"MName"];
        }


    }

    if(field ==3)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"LName"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"LName"];
        }

    }

    if(field ==4)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"City"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"City"];
        }

    }

    if(field ==5)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"State"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"State"];
     }

    }

    if(field ==6)
    {
        if(textField.text ==[_detailsDictionary valueForKey:@"Country"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"Country"];
        }

    }

    if(field ==7)
    {

        if(textField.text ==[_detailsDictionary valueForKey:@"DOB"])
        {
            NSLog(@"cell1.userDetailTextField.text %@",textField.text);
        }
        else
        {
            [_detailsDictionary setObject:textField.text forKey:@"DOB"];
        }

    }

}

iOS - 保存时最后一个字符消失

5 个答案: